About the St Mary Cray Conservation Area
The St Mary Cray Conservation Area covers about 14 hectares and was designated by London Borough of Bromley in 1979. Inside the boundary are 15 listed buildings (1 Grade II*, 14 Grade II). The most significant is Church of St Mary, Grade II*. Part of the area lies in flood zone 3, so an extension may need a flood risk assessment.
What changes inside the conservation area
Conservation areas are “Article 2(3) land”. You keep most permitted development rights, but these are removed or tightened.
- Rear extensionElsewhere: 3 m · 6 m with PANo 6 m / 8 m prior approval
- Two-storey extensionElsewhere: 3 mNeeds planning permission
- Side extensionElsewhere: Half the widthNeeds planning permission
- Loft conversionElsewhere: 50 m³Needs planning permission
- Garden roomElsewhere: 2.5 m high by boundariesNot beside the house
- PorchElsewhere: 3 m²Same limits
- Solar panelsElsewhere: 0.2 m projectionSame limits
- Air source heat pumpElsewhere: 1 unitNot facing the road
- Fences, walls and gatesElsewhere: 2 m · 1 m by a roadSame limits
- External claddingElsewhere: Matching materialsNeeds planning permission
- Tree workElsewhere: No notice6 weeks’ notice to the council
- Demolition (over 115 m³)Elsewhere: AllowedNeeds planning permission
Limits for a semi-detached house under the GPDO 2015. An Article 4 direction can remove more.
Listed buildings in the conservation area
Any work affecting these needs listed building consent, inside or out. Each links to its entry on the National Heritage List.
- Church of St MaryGrade II*
- 231, High StreetGrade II
- 316 and 318, High StreetGrade II
- 4,6,8 and 8a, Kent RoadGrade II
- 40-50, High StreetGrade II
- 5-9, High StreetGrade II
- 87, High StreetGrade II
- 91, High StreetGrade II
- Durley HouseGrade II
- Lime Tree HouseGrade II
- Rosecroft CottageGrade II
- RowlandsGrade II
- Spring HallGrade II
- St Mary Cray War MemorialGrade II
- The Blue Anchor Public HouseGrade II
Streets in the conservation area
Streets with listed buildings inside the boundary. Boundaries often split a street — check your exact address.
The council’s appraisal
WEBSt Mary Cray Conservation Area AppraisalLondon Borough of Bromley’s description of the area’s character — what planners look at when you apply.Open on council site ↗Nearby conservation areas
Boundary and listed buildings from London Borough of Bromley and Historic England via planning.data.gov.uk (OGL). Guidance only — not an official council check.